sowed 10seed in a little patch some years ago but forgot about them.
years later i go back i find a very stange plant growing that is full of seeds. after checking what radish looked like i found out that those were radish seed from those same plant i sowed back in summer year past. i got a box full of seeds from those plant.
planted them in rows, about 200. waited to the end of summer (50~ days later) to harvest. about 80% of plant had eatable roots. the rest didnt have any and were only leaves. i let 2 of them seed and kept them for this year.
the radish have a very nice color, even very big 3-6inch diameter they are still very crunchy without any woody feeling. the leaves are very rough with spike on them, they are supposed to be comestible but i dont see how. they need alot of water or they get very spicy. i found that slicing them on a plate and letting them air out for 30min remove the hotnest. DO NO FREEZE THEM, i did and they turn to mush.
my soil is very hard clay.

Wow. This really performed poorly here. Although germination was 100%, we didn't eat a single radish. I just pulled up the whole batch, they were bolting. Very few bulbs, mostly thin roots, full of maggots. I mean really full, crawling on them, I have never seen anything like this.
I have several other types of radishes that grew normally: good sized bulbs, no maggots. We didn't even have an especially warm spring here (z7). Not suited for this climate I guess.

I'm in zone 8b. I planted these in 4 40 ft rows about 2 weeks apart. If harvested at the normal size they were excellent. My wife wanted me to let them get larger but when I did they lost some taste and crispness. So to satisfy my wife I ordered some larger varieties from Baker Creek for this fall. We'll see how they turn out. I would say they are a good all around radish.

These germinate well, and result in gorgeous and tasty large purple radishes. My neighbors love receiving extras. I did note that several never developed into full radishes, just a root, before bolting, but that is probably due to sporadic heat waves. I will definitely be growing these again.